private void clear() { dpFromCity.Items.Clear(); dpToCity.Items.Clear(); dpAirlineName.Items.Clear(); dpFlightName.Items.Clear(); DropDownList1.Items.Clear(); DropDownList2.Items.Clear(); DropDownList4.Items.Clear(); DropDownList5.Items.Clear(); DropDownList1.Items.Add("0"); DropDownList4.Items.Add("0"); for (int i = 1; i <= 24; i++) { DropDownList1.Items.Add(i.ToString()); DropDownList4.Items.Add(i.ToString()); } DropDownList1.DataBind(); DropDownList4.DataBind(); for (int i = 0; i <= 59; i++) { DropDownList2.Items.Add(i.ToString()); DropDownList5.Items.Add(i.ToString()); } DropDownList2.DataBind(); DropDownList5.DataBind(); txtDuration.Enabled = false; txtDuration.Text = ""; chkStatus.Checked = false; CityManager obj = new CityManager(); try { City[] cityList = obj.GetCities(); dpFromCity.Items.Add("None"); foreach (City c in cityList) { ListItem item = new ListItem(c.Name, c.CityId.ToString()); dpFromCity.Items.Add(item); } dpFromCity.DataBind(); dpToCity.Items.Add("None"); foreach (City c in cityList) { ListItem item = new ListItem(c.Name, c.CityId.ToString()); dpToCity.Items.Add(item); } dpToCity.DataBind(); } catch (CityManagerException e) { lblError.Text = e.Message; } Airlines objairline = new Airlines(); try { List<Airline> airlinelist = objairline.GetAllAirlinesCollecction(); dpAirlineName.Items.Add("None"); foreach (Airline c in airlinelist) { ListItem item = new ListItem(c.Name, c.Id.ToString()); dpAirlineName.Items.Add(item); } dpAirlineName.DataBind(); } catch (AirlineManagerException e) { lblError.Text = e.Message; } var travelClassvalues = Enum.GetValues(typeof(TravelClass)).Cast<TravelClass>(); Repeater1.DataSource = travelClassvalues; Repeater1.DataBind(); }